Improvement in double-acting supply-valves



P. HARVEY.

vDouble-:inning Supply-Valves...

-Patenlted July 2,1872.

nu T N E V N UNITED STATES PATENT OFFICE.

' PATRICK HARVEY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN DOUBLE-ACTING SUPPLY-VALVES.

SPECIFICATION.

To all whom it may concern:

Be it known that I, PATRICK HARVEY, of

Chicago, in the county of Cook and State of enable others skilled in theart to which my invention appertains to make and use the same, referencebeing had to the accompanying drawing forming a part of thisspecification, and in which- Figure l represents a vert-ical centralsection through my improved valve device; Fig. 2, a bottom view ofcertain parts thereof; Fig. 3, a top view of the whole; and Fig. 4, abottom view of the piston.

Like letters of reference indicate like parts.

The object of my inventionis to rendervalves of this class more perfectin their operation;

and my invention consists in more effectually preventing foreignsubstances from interfering with the proper action of the valvemechanism. This I accomplish bymeans of a hollow perforated or slottedpiston. My invention also consists in certain other novel featureshereinafter mentioned.

In the drawing, A represents the case; B, the cover; and C, theoperating rod. The cover may be screwed upon the case in the mannershown, and a is a washer interposed between these parts to form awater-tight joint. The rod C passes freely through the said cover andwasher. D is a valve having a socket, D'. e e are guide-ways on theinner face of the case, and e e are corresponding notches in the head ofthe valve B, into which notches the said guide-ways project. Theinnerface of the socket D is provided with a female screw, and the rod C witha male screw, so that these parts may be attached to each other in themanner shown, and the stroke of the rod regulated by screwingit more orless into the socket, the guide-ways or projections e c preventingthesocket from turning during this adjustment. E is a spiral spring,supporting the valve D, and resting on a seat in the case A.

Fis a cylinder having aclosed bottom, and its lower portion perforatedor slotted, as shown at f. This cylinder swells outward above andSpecification forming part of Letters. Patent No. 128,484, dated July 2,1872.

below its perforated portion, so as to reach or nearly reach the case A,and form a piston. g g are leather strips or other suitable packing,about the heads of the piston so formed, and this packing is capable ofspreading outward under a pressureof water within the chamber betweenthe heads of the piston, so as to prevent the water therein escaping,except through the perforations or slots f. When the cylinder or pistonF is made of separate parts the packing g g may be secured between theseparts, as shown. G is a spiral spring supporting the cylinder or pistonF, and pressing the mouth of the same against the valve D. h is a washerinterposed between the valve D and the mouth of the cylinder F,.to forma water-tight joint, and the said mouth is rounded off, in the mannershown, to more effectually prevent foreign matter from lodging on thatpart of the cylinder. B is the bottom of the case, and bis a postprojecting from the center thereof to retain the spring Gr in its properplace. I is a washer on the bottom of the case A. J is al water-passage,communioatin g with the chambers about and below the piston F, and K isa cone-pointed screw entering the said passage, and by turning the saidscrew or shut-off, the water-passage J is opened or closed so that thequantity of water passing through the said passage is regulated. Thebottom of the piston F is notched, in the manner shown in Fig. 4, sothat the water in the chamber below the piston may escape into thechamber above as the piston is forced down. L L is the supplypipe, thewater entering the valve device through the pipe L and leaving itthrough the pipe L. M is the waste-pipe for the escape of water from thechamber above the piston-head.

In order to operate, my improved valve the rod C is depressed by theseat of the closet, or in any suitable and convenient manner. rlhesprings E and G yield to this pressure, and the valve D and cylinder orpistonF move downward, the valve remaining closed. As soon as thepressure upon the rod C is relieved the spring E forces the valve Dupward against `the cover, .while the cylinder or piston F moves upslowly, according to the amount of water entering the chamber below thelower pistonhead through the passage J. The valve thus remains openuntil the cylinder F strikes the washer h. The time during which thevalve 'washer h and the mouth of the cylinder.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent,vis-

' In Combination, the rod C, valve D, cylinder or piston F,water-passage J, and screw or shut-off K, operating together inconnection with the ease Aand springs E and G, substantially as and forthe purposes specied.

The foregoing speeiioation signed by me this 22d day of February, A. D.1872.

PATRICK HARVEY.

Witnesses N. C. GRIDLEY, F. F. WARNER.

